Rotary engine



Patented May' 9, 1922;.

2 SHEETS-SHEET I.

All.

l A @A T. RAUGSTAD.

ROTARY ENGINE.

APPLlcATloN FILED AuG.26. |921.

Patented May 9, 1922;

2 SHEETS-SHEET 2.

THOR RAUGSTAD, OF SANDNZES, NEAR STAVANGER, NORWAY.

ROTARY ENGINE.

Laieeea.

Specification of Letters Patent.

rmmanwenma Application filed August 26, 1921. Serial No. 495,529.

T all LU/lam it may concern.'

Be it known that I, THOR RAUGSTAD, a subject of the King of Norway,residing` at Sandnees, near Stavanger, Norway, have invented certain newand useful improvements in a Rotary Engine, (for which lhave liledapplication in Norway Aug. 9, 1920,'

marked thereon, which form a part of this specification.

The present invention has for its object to provide a rotary enoineadapted to be driven by liquid or gaseous medium (steam) and is alsoadapted to act as a'pump by having' its shaft driven from another sourceof power.

In the accompanying drawings, Figure 1 is a front view partly insection, of an engine. embodying my invent-ion:

Fie. 2, on the left hand side is a section on line A-B of Fig. 1 and onthe right hand side partly a sectional view on line C-D and partly aside view of the engine.

The engine comprises a casing constituted by two side plates 19 forminga substantially circular chamber, the lower major portion of which has auniform crosssectional area whilethe upper or smaller portion has agradually increasing cross-sectional area. On the engine shaft which isjournaled in the plates axially of the chamber, is fixed a rotor 11which has a peripheral annular channel 12. preferably V-shaped in crosssection, forming the pressure chamber of the engine. Mounted. in the topof the casing and extending into the annular channel 12 is an abutment13 conforming to the crosssectional area of said channel.

A vane, operating in conjunction with the abutment, constitutes thedriving element of the rotor. It consists of two blades 8, pivotallymounted on an axis 15 arranged on the l rotor at right-angles to theaxis of the latter, said blades being movable laterally into and out ofthe channel 12 through laterally arranged slot-s formed in the sidewalls of said channel and are adapted to open and close the latter ashereinafter described.

On one corner of each blade, adjacent the plates 19, is formed a.trunnion 16 carry/'ing an anti-friction roller 17 which runs in a guidegroove 18 formed in the inner face of each side plate 19 of the cas-ing.

Steam or other pressure fluid is supplied to a chest 2 through an inletpipe `1 said chest containing a slide valve 4 which controls a. port 5in an auxiliary slide 6, said port being connected by a passage ITwiththe channel or pressure chamber 12 whereby they steam is supplied to thelatter between. the vane and the abutment. To permit of reversing theengine a chest of the structure just described is mounted on the casingon each side of. the abutment and steam supplied through the inlet ofone chest, for instance the inlet 1, will exhaust from the outlet 14 ofthe otherehest located on the opposite side of the abutment 18.. Theexhaust or outlet ports one of which is shown at the left side of Fig.1, are controlled by the auxiliary/melide valves 6. A lever 28 havingahandle 27 is so connected to one auxiliary valve by the rods 29 and andto the `other auxiliary valve by rods 81 and 82 that said 4valvesaresimultaneously operated to close one port and open theother port.

Each slide valve 4 is operated from an eccentric 20 fixed on the engineshaft 10, said eccentric operating a pitrnan 21, connected to the arm 22of a bell crank lever, the arm 23 of which is slidably connected to arod 24 of said slide valve. The blades 8 of the vane are provided withHuid-tight packing strips 34 secured to the sides and outer end by anysuitable means.

When operating the engine in one direc-v tion, the auxiliary slide valve6 is in the position shown at the left side of Fig. 1, closing theoutlet port 25 and channel 26, while the auxiliary slide valve in theother chest uncovers the outlet port of channel 14. Steam or otherpressure medium entering inlet channel 1 passes into the channel orpressure chamber 12 between the left side of the abutment 18 and thevane, the blades of the latter being in position for closing the groove.As the vane approaches the right side of the abutment the blades areseparated and moved out of the groove 12 by the trunnions 16 travelingin the grooves 18. The walls 19 of the casing are so formed that thegrooves 18 cause the blades to be withdrawn from the channel 12 inapproaching the abutment and to move back into the channel after passingthe abutment.

To reverse the engine, the lever 274-28 is shifted to the le lit fromthe position shown in l so that the slide valve G closes port 5 andopens port and Channel 2G. The slide valve in the Chest at the right etthe abut-ment 13 is siniiultaneously shifted se that the port of inletChannel 33 is opened and the port oi' exhaustchannel ltis Closed.

l claim- 1. rotarv7 engine comprising a easing` a rotor journaledtherein having a periphei channel, a stationary abutment prejeeting intethe latter, vane blades pinI "ed in the Channel and movable transverselythrough lateral slots formed in the sides ot' the shannel, the Walls ofthe easing constituting guides for the blades to move the latter intoand out oit the channel during the movement of the rotor.

2. A rotary engine7 comprising)` rotor having` a peripheral Channel, astationary abutment projecting into the latten vane blades pivoted inthe Channel and movable transversely through lateral slots `formed inthe sides of the channel7 a easing enclosing` the rotor having sideWalls constituting guides for the blades to move the latter into and outof the channel during their movement in passing the abutment.

8. A rotary engine, comprising a easin` forming a chamber having aportion of uniform cross-sectional area and a portion of graduallyincreasing cross-sectional area, a rotor journaled in the easing having,a peripheral channel, a stationary abutment mounted in the easing at thepoint ot largest area and projecting inte the Channel, vane bladespivoted in the channel and movable transversely through lateral slotsformed in the sides oit the Channel, trunnions termed on the bladesprojecting' into guide grooves formed in the Walls of the easing`whereby said blades are moved into and out of' the channel during' themovement of the rotor.

4. A rot-ary engine, Comprising a easing` `forming a chamber having` aportion ot uniform Cross-sectional area and a portion oit graduallyincreasing eross-sertional area, a rotor journaled in the easing havinga peripheral Channel7 a stationary abutment mounted in the easing atthepoint of largest areay and projecting into the channel, 'vane bladespivoted in the channel and movable transversely through lateral slotsformed in the sides of the Channel, trunnions Yformed on the bladesprojectinginto guide grooves formed in the Walls of the easing wherebysaid blades are moved into and out ot the channel during` the movementoit the rotor, and means on opposite sides of the abutment for supplyingpressure fluid to said Channel.

ln testimony that l claim the foregoing as my invention, have signed my.name in presence of tivo subscribing Witnesses.

THOR RAUGSTAD.

lllitnesses lBAUL BRONTIN, Lus El I-lnLLmGsBnD.

